JP2019129562A - Coil welding device - Google Patents

Abstract

To handle formation of multiple types of stator coils having coil end portions different in the dimensions, without deteriorating the production efficiency.SOLUTION: A core receiving portion 30 for supporting a lower surface of a stator core and a coil receiving portion 40 for supporting a lower surface of a coil attached to the stator core are formed so as to have a plurality of fitting positions different in the phase in the circumferential direction. By switching of the fitting position of the coil receiving portion 40 fitted to the core receiving portion 30, the position, in the height direction, of the coil receiving portion 40 can be changed. Accordingly, any dedicated positioning tool (support base) is not required. Thus, formation of multiple types of stator coils having coil end portions different in the height can be handled while the production efficiency is not deteriorated.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a coil welding apparatus in which a stator core having coils mounted on teeth is installed on a support base, and ends of two corresponding coils are welded to form a stator coil.

  Conventionally, as a coil welding apparatus of this type, the coil end portion of a segment conductor inserted in a slot of a stator core is positioned by a base plate (positioning jig) and a pressing jig, and ends of corresponding two segment conductors Have been proposed to form a stator coil (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 2015-231277

  In the coil welding apparatus described above, when forming a plurality of types of stator coils having different dimensions of the coil end portion, a dedicated positioning jig or pressing jig is prepared for each dimension of the coil end portion to replace the jig. The production efficiency is greatly reduced.

  The main purpose of the coil welding apparatus of the present invention is to cope with the formation of a plurality of types of stator coils having different dimensions of the coil end portion without reducing the production efficiency.

  The coil welding apparatus of the present invention employs the following means in order to achieve the main object described above.

The coil welding apparatus of the present invention includes:
A coil welding device comprising a stator core and a support for supporting a coil mounted on the teeth of the stator core, and welding the ends of two corresponding coils among the coils mounted on the teeth,
The support base includes a core support member that supports the lower surface of the starter core, and a coil support member that supports the lower surface of the coil in a state of being fitted to the core support member,
The core support member and the coil support member have a plurality of fitting positions with different phases in the circumferential direction,
The coil support member can change the position in the height direction with respect to the core support member by switching the fitting position to be fitted to the core support member.
Make it a gist.

  In the coil welding device according to the present invention, the core support member supporting the lower surface of the stator core and the coil support member supporting the lower surface of the coil mounted on the stator core have a plurality of fitting positions different in phase in the circumferential direction. To form. And the position of the height direction of a coil support member is changeable with respect to a core support member by switching the fitting position fitted with respect to a core support member. As a result, a dedicated positioning jig (support base) becomes unnecessary, and it is possible to cope with the formation of a plurality of types of stator coils with different dimensions of the coil end without reducing the production efficiency.

It is a block diagram which shows the outline of a structure of the coil welding apparatus 20 as one Example of this invention. 1 is a configuration diagram showing an outline of a configuration of a coil welding apparatus 20. It is sectional drawing of two types of stator 10A, 10B from which a dimension differs. 2 is an external perspective view showing an external appearance of a core receiver 30. FIG. 3 is an external perspective view showing an external appearance of a coil receiver 40. FIG. 3 is an external perspective view showing the external appearance of a core receiver 30, a coil receiver 40, and a push-up pin 62. FIG. It is explanatory drawing which shows a mode that the position of the height direction of the coil receptacle 40 is switched. It is explanatory drawing which shows a mode that the position of the height direction of the coil receiver 40 is switched. It is explanatory drawing which shows a mode that the position of the height direction of the coil receptacle 40 is switched.

  Next, modes for carrying out the present invention will be described using examples.

  FIG. 1 and FIG. 2 are configuration diagrams schematically showing the configuration of a coil welding apparatus 20 as an embodiment of the present invention, and FIG. 3 is a cross-sectional view of two types of stators 10A and 10B having different dimensions. The coil welding apparatus 20 according to the embodiment constitutes a part of a stator manufacturing apparatus that manufactures a stator of a three-phase alternating current motor mounted on, for example, an electric car or a hybrid car. The stator manufacturing apparatus forms a concentrated winding rectangular coil in which one flat wire is bent in an edgewise direction to form a concentrated coil, and the rectangular coil is mounted on teeth of a starter core together with, for example, a resin insulator. Then, by electrically connecting the terminals of the rectangular coil and the terminals of the corresponding other rectangular coils using the coil welding apparatus 20 of the embodiment, the stator coils of the U phase, the V phase, and the W phase are connected to the stator core. A stator having the same is manufactured.

  The coil welding apparatus 20 according to the embodiment is, for example, a laser welding apparatus, and as shown in FIGS. 1 to 3, the outer diameters d1 and d2 of the stator cores 12A and 12B and the coils 14A and 14B attached to the stator cores 12A and 12B. It is configured to be compatible with the manufacture of two types of stators 10A and 10B having different heights h1 and h2 of the coil end portion. The coil welding apparatus 20 includes a welding head 22, a core receiver 30 and a coil receiver 40 as a support, a rotating device 52, an elevating device 54, a push-up pin 62, and a control device 24.

  The core receiver 30 positions the stator cores 12A and 12B by supporting the outer peripheral edges of the lower surfaces of the stator cores 12A and 12B. FIG. 4 is an external perspective view showing the external appearance of the core receiver 30. As shown in FIG. As shown in the figure, the core receiver 30 includes a first annular support portion 32 and a second annular support portion 34 formed at a position one step higher than the first annular support portion 32 on the outer diameter side of the first annular support portion 32. And an annular fitting part 36 formed at a position one step lower than the first annular support part 32 on the inner diameter side of the first annular support part 32. The first annular support portion 32 is a support portion for supporting the stator core 10A on the smaller diameter side (outer diameter d1 side) of the two stator cores 12A and 12B having different outer diameters d1 and d2, and the second annular support portion 34 These are support portions for supporting the stator core 10B on the large diameter side (the outer diameter d2 side). The annular fitting portion 36 is fitted with the coil receiver 40 and positions the coil receiver 40. On the upper surface of the annular fitting portion 36, the first recess 36a of a predetermined depth, the second recess 36b of a depth shallower than the first recess 36a, and an arc along the circumferential direction are curved in the vertical direction The penetrating long holes 36 o are provided on the same circumference. The first concave portion 36a and the second concave portion 36b are respectively provided at equal angular intervals in a plurality and in the same number (for example, three), and both are out of phase with each other by a predetermined amount in the circumferential direction. The long hole 36o is formed such that the length in the circumferential direction corresponds to the amount of phase shift between the first recess 36a and the second recess 36b.

  The coil receiver 40 supports the lower surface of the coil end portion of the coil mounted on the stator core in a state of being fitted with the annular fitting portion 36 of the core receiver 30 to position each coil. FIG. 5 is an external perspective view showing the external appearance of the coil receiver 40, and FIG. 6 is an external perspective view showing the external appearance of the core receiver 30, the coil receiver 40, and the push-up pin 62. As shown in the figure, the coil receiver 40 has a main body 42 formed in an annular shape with substantially the same outer diameter as the annular fitting portion 36, and leg portions 44 protruding downward from the lower surface of the main body 42. Although not shown, a plurality of ribs extending radially in the radial direction are provided on the upper surface of the main body 42 so that the coil end portions of the coils mounted on the stator core are not displaced in the circumferential direction. The leg portions 44 are provided in the same number (for example, three) as the first concave portions 36 a and the second concave portions 36 b and at the same angular interval, and are phase-aligned in the circumferential direction with respect to the core receiver 30, whereby the first concave portions 36 a. And the second recess 36b can be fitted. The coil receiver 40 is a coil end of the coil 14A corresponding to the upper surface of the first annular support portion 32 supporting the stator core 12A on the small diameter side (the outer diameter d1 side) when the leg portion 44 is fitted in the first recess 36a. Is positioned at a predetermined height (first height) with respect to the core receiver 30 so that the distance between the upper surface of the main body 42 supporting the portion substantially coincides with the height h1 of the coil end portion of the coil 14A. Is done. On the other hand, when the leg 44 is fitted in the second recess 36b shallower than the first recess 36a, it corresponds to the upper surface of the second annular support 34 supporting the stator core 12B on the large diameter side (outer diameter d2 side). A position (first position) higher than a predetermined height with respect to the core receiver 30 such that the distance between the upper surface of the main body 42 supporting the coil end portion of the coil 14B substantially coincides with the height h2 of the coil end portion of the coil 14B. Positioned at 2 heights).

  The rotating device 52 has a drive motor having a rotating shaft 52a attached to the central axis of the core receiver 30, and rotates the core receiver 30 about the central axis by rotationally driving the rotating shaft 52a. The raising / lowering device 54 raises / lowers the slider 50 by an actuator such as a hydraulic cylinder. A rotating device 52 is fixed to the slider 50, and the lifting device 54 can raise and lower the core receiver 30 by raising and lowering the slider 50.

  The push-up pin 62 pushes the coil receiver 40 upward relative to the core receiver 30 to release the fitting of the two, and as shown in FIG. Is provided. As shown in FIGS. 1 and 2, the base end portion of the push-up pin 62 is fixed to the frame 60 of the coil welding apparatus 20 so that the distal end portion faces upward, and the core receiver 40 is lowered by the elevating device 54. Thus, the corresponding long hole 36o is penetrated, and the tip end portion is in contact with the lower surface of the main body 42 of the coil receiver 40 installed in the annular fitting portion 36. Thereby, the coil receiver 40 can be pushed up relatively with respect to the core receiver 30, and both fitting can be cancelled | released. The phase of the coil receiver 40 in the circumferential direction can be shifted with respect to the core receiver 30 by rotating the core receiver 30 by the rotating device 52 in a state where the coil receiver 40 is pushed up by the push-up pins 62. Thereby, the recessed part which fits the leg part 44 of the coil receiver 40 among the 1st recessed part 36a and the 2nd recessed part 36b of the core receiver 30 can be changed. Since the first recess 36a and the second recess 36b are formed at different depths, the position of the coil receiver 40 in the height direction relative to the core receiver 30 can be changed by changing the recess into which the leg 44 is fitted. Can be changed.

  The control device 26 controls the entire coil welding device 20 and is configured as a microprocessor including a CPU, a ROM, a RAM, an input / output port, and the like. From the control device 26, a drive signal to the welding head 22, a drive signal to the rotating device 52, a drive signal to the lifting device 54, and the like are output via an output port.

  The operation of the coil welding apparatus 20 of the embodiment configured in this way, particularly the operation when switching the stators 10A and 10B to be manufactured by changing the position of the coil receiver 40 in the height direction will be described. 7 to 9 are explanatory views showing the state of switching the position of the coil receiver 40 in the height direction. Hereinafter, the coil receiver 40 is positioned relative to the core receiver 30 from the state shown in FIG. 1 in which the coil receiver 40 is positioned at the first height to support the small-diameter stator 10A and the corresponding two coils 12A are welded. Will be described in connection with the state shown in FIG. 2 in which the large diameter stator 10B is supported at the second height and the corresponding two coils 12B are welded. As shown in FIG. 7, first, the lifting device 54 is controlled to lower the core receiver 30, and the push-up pin 62 is penetrated into the long hole 36o of the core receiver 30 and its tip is in contact with the lower surface of the coil receiver 40. Let The coil receiver 40 is pushed up relative to the core receiver 30 by the push-up pin 62, and the fitting with the core receiver 30 is released. Subsequently, as shown in FIG. 8, the rotating device 52 is controlled so that the leg 44 of the coil receiver 40 is directly above the second recess 36 b of the core receiver 30, and the circumferential phase of the coil receiver 40 is adjusted. The core receiver 30 is shifted by a predetermined amount. Then, as shown in FIG. 9, the lifting device 54 is controlled to raise the core receiver 30 to lower the push-up pin 62 relative to the core receiver 30, and the length of the push-up pin 62 is increased. Pull out from hole 36o. As a result, the coil receiver 40 is positioned at the second height relative to the core receiver 30 with the leg 44 fitted in the second recess 36 b. The switching from the state of FIG. 2 to the state of FIG. 1 can be performed as follows. That is, the core receiver 30 is lowered to separate the coil receiver 40 from the core receiver 30, and the rotating device 52 is reversely rotated so that the leg portion 44 is directly above the first recess 36a. And the core receiver 30 may be raised to fit the leg 44 into the first recess 36a.

  In the coil welding apparatus 20 of the present embodiment described above, the core receiver 30 that supports the lower surfaces of the stator cores 12A and 12B and the coil receiver 40 that supports the lower surfaces of the coils 14A and 14B mounted on the stator cores 12A and 12B are provided. It forms so that it may have several fitting position from which a phase differs in direction. Then, the position in the height direction of the coil receiver 40 can be changed by switching the fitting position to be fitted to the core receiver 30. As a result, since a dedicated positioning jig (support base) is not required for each stator, it is possible to cope with the manufacture of a plurality of types of stator coils having different dimensions of the coil end without reducing the manufacturing efficiency.

  The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problems will be described. In the embodiment, the starter cores 12A and 12B correspond to "stator cores", the coils 14A and 14B correspond to "coils", the core receivers 30 and 40 correspond to "supports", and the core receivers 30 are " It corresponds to a “core support member”, and the coil receiver 40 corresponds to a “coil support member”.

  In addition, the correspondence of the main elements of the embodiment and the main elements of the invention described in the section of the means for solving the problem implements the invention described in the column of the means for solving the problem in the example. Therefore, the elements of the invention described in the column of means for solving the problems are not limited. That is, the interpretation of the invention described in the column of means for solving the problems should be made based on the description of the column, and the examples are those of the invention described in the column of means for solving the problems. It is only a specific example.

  As mentioned above, although the form for implementing this invention was demonstrated using the Example, this invention is not limited at all to such an Example, In the range which does not deviate from the summary of this invention, it is with various forms. Of course, it can be implemented.

  The present invention can be used in the manufacturing industry of coil welding equipment.

  10A, 10B stator, 12A, 12B stator core, 14A, 14B coil, 20 coil welding device, 22 welding head, 24 control device, 30 core receiver, 32 first annular support, 34 second annular support, 36 annular fitting Part, 36a 1st recessed part, 36b 2nd recessed part, 36o oblong hole, 40 coil end receptacle, 42 main body, 44 leg part. 50 slider, 52 rotating device, 54 lifting device, 60 frame, 62 push-up pin.

Claims (1)

A coil welding device comprising a stator core and a support for supporting a coil mounted on the teeth of the stator core, and welding the ends of two corresponding coils among the coils mounted on the teeth,
The support base has a core support member for supporting the lower surface of the starter core, and a coil support member for supporting the lower surface of the coil in a state of being fitted to the core support member.
The core support member and the coil support member have a plurality of fitting positions with different phases in the circumferential direction,
The coil support member can change the position in the height direction with respect to the core support member by switching the fitting position to be fitted to the core support member.
Coil welding equipment.

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